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Title: Centre vortex removal restores chiral symmetry

Abstract

The influence of centre vortices on dynamical chiral symmetry breaking is investigated through the light hadron spectrum on the lattice. Recent studies of the quark propagator and other quantities have provided evidence that centre vortices are the fundamental objects underpinning dynamical chiral symmetry breaking in SU(3) gauge theory. For the first time, we use the chiral overlap fermion action to study the low-lying hadron spectrum on lattice ensembles consisting of Monte Carlo, vortex-removed, and vortex-projected gauge fields. We find that gauge field configurations consisting solely of smoothed centre vortices are capable of reproducing all the salient features of the hadron spectrum, including dynamical chiral symmetry breaking. In conclusion, the hadron spectrum on vortex-removed fields shows clear signals of chiral symmetry restoration at light values of the bare quark mass, while at heavy masses the spectrum is consistent with a theory of weakly-interacting constituent quarks.

Authors:
ORCiD logo [1];  [2];  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Adelaide (Australia)
  2. Univ. of Adelaide (Australia)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1417839
Report Number(s):
JLAB-THY-18-2625; DOE/OR/23177-4320; arXiv:1708.06789
Journal ID: ISSN 0954-3899
Grant/Contract Number:  
DP120104627; LE120100181
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. G, Nuclear and Particle Physics
Additional Journal Information:
Journal Volume: 44; Journal Issue: 12; Journal ID: ISSN 0954-3899
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; chiral symmetry; vacuum structure; center vortices

Citation Formats

Trewartha, Daniel, Kamleh, Waseem, and Leinweber, Derek B. Centre vortex removal restores chiral symmetry. United States: N. p., 2017. Web. doi:10.1088/1361-6471/aa9443.
Trewartha, Daniel, Kamleh, Waseem, & Leinweber, Derek B. Centre vortex removal restores chiral symmetry. United States. doi:10.1088/1361-6471/aa9443.
Trewartha, Daniel, Kamleh, Waseem, and Leinweber, Derek B. Wed . "Centre vortex removal restores chiral symmetry". United States. doi:10.1088/1361-6471/aa9443.
@article{osti_1417839,
title = {Centre vortex removal restores chiral symmetry},
author = {Trewartha, Daniel and Kamleh, Waseem and Leinweber, Derek B.},
abstractNote = {The influence of centre vortices on dynamical chiral symmetry breaking is investigated through the light hadron spectrum on the lattice. Recent studies of the quark propagator and other quantities have provided evidence that centre vortices are the fundamental objects underpinning dynamical chiral symmetry breaking in SU(3) gauge theory. For the first time, we use the chiral overlap fermion action to study the low-lying hadron spectrum on lattice ensembles consisting of Monte Carlo, vortex-removed, and vortex-projected gauge fields. We find that gauge field configurations consisting solely of smoothed centre vortices are capable of reproducing all the salient features of the hadron spectrum, including dynamical chiral symmetry breaking. In conclusion, the hadron spectrum on vortex-removed fields shows clear signals of chiral symmetry restoration at light values of the bare quark mass, while at heavy masses the spectrum is consistent with a theory of weakly-interacting constituent quarks.},
doi = {10.1088/1361-6471/aa9443},
journal = {Journal of Physics. G, Nuclear and Particle Physics},
number = 12,
volume = 44,
place = {United States},
year = {Wed Nov 15 00:00:00 EST 2017},
month = {Wed Nov 15 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 15, 2018
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